{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-5426", "assignerOrgId": "027e81ed-0dd4-4685-ab4d-884aec5bb484", "state": "PUBLISHED", "assignerShortName": "Mandiant", "dateReserved": "2026-04-02T14:20:13.588Z", "datePublished": "2026-04-16T15:18:46.224Z", "dateUpdated": "2026-04-16T15:22:20.823Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "027e81ed-0dd4-4685-ab4d-884aec5bb484", "shortName": "Mandiant", "dateUpdated": "2026-04-16T15:22:20.823Z"}, "title": "KnowledgeDeliver deployments before February 24, 2026 use a static ASP.NET/IIS machineKey value", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-321", "description": "CWE-321 Use of hard-coded cryptographic key", "type": "CWE"}]}, {"descriptions": [{"lang": "en", "cweId": "CWE-502", "description": "CWE-502 Deserialization of untrusted data", "type": "CWE"}]}], "impacts": [{"capecId": "CAPEC-586", "descriptions": [{"lang": "en", "value": "CAPEC-586 Object Injection"}]}], "affected": [{"vendor": "Digital Knowledge", "product": "KnowledgeDeliver", "versions": [{"status": "affected", "version": "0", "lessThan": "20260224", "versionType": "date"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "Hard-coded ASP.NET/IIS machineKey value in Digital Knowledge KnowledgeDeliver deployments prior to February 24, 2026 allows adversaries to circumvent ViewState validation mechanisms and achieve remote code execution via malicious ViewState deserialization attacks", "supportingMedia": [{"type": "text/html", "base64": false, "value": "Hard-coded ASP.NET/IIS machineKey value in Digital Knowledge KnowledgeDeliver deployments prior to February 24, 2026 allows adversaries to circumvent ViewState validation mechanisms and achieve remote code execution via malicious ViewState deserialization attacks"}]}], "references": [{"url": "https://github.com/mandiant/Vulnerability-Disclosures/blob/master/2026/MNDT-2026-0009.md", "tags": ["third-party-advisory"]}, {"url": "https://www.digital-knowledge.co.jp/product/kd/", "tags": ["product"]}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "Vulnogram 1.0.1"}}}}

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{"cveTags": [], "descriptions": [{"lang": "en", "value": "Hard-coded ASP.NET/IIS machineKey value in Digital Knowledge KnowledgeDeliver deployments prior to February 24, 2026 allows adversaries to circumvent ViewState validation mechanisms and achieve remote code execution via malicious ViewState deserialization attacks"}], "id": "CVE-2026-5426", "lastModified": "2026-04-16T16:16:17.693", "metrics": {}, "published": "2026-04-16T16:16:17.693", "references": [{"source": "mandiant-cve@google.com", "url": "https://github.com/mandiant/Vulnerability-Disclosures/blob/master/2026/MNDT-2026-0009.md"}, {"source": "mandiant-cve@google.com", "url": "https://www.digital-knowledge.co.jp/product/kd/"}], "sourceIdentifier": "mandiant-cve@google.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-321"}, {"lang": "en", "value": "CWE-502"}], "source": "mandiant-cve@google.com", "type": "Secondary"}]}

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